VBS/Lee-ATX sends itself to all email addresses found in Outlook Address Book.
When the attachment is opened, first the worm copies itself in Windows system directory as ANTRAXINFO.VBS. Then, the worm modifies the registry, so that it is activated by Windows start:

The worm tries to send itself by email, using Outlook Address Book, to all entries found in it. After doing this, the worm makes the following registry entry:

HKCU\Software\Antrax\Mailed = 1

If the worm finds the mIRC chat program on C:\MIRC or C:\MIRC32, it searches for MIRC.INI file in these directories and if found, creates SCRIPT.INI file and makes the registry entry:

HKCU\Software\Antrax\Mirqued = 1

If the worm finds Pirch chat program on C:\PIRCH or C:\PIRCH32, it creates EVENTS.INI file, for ensuring that the ANTRAXINFO.VBS will be sent by Pirch when it is next launched. Then, the following registry entry is made:

HKCU\Software\Antrax\Pirched = 1

If VBS/Lee-ATX is opened on January 26th, a message window appears:
Antrax Worm By wAsEk